<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title></title>
    <style>
        .tab ul {
            overflow: hidden;
            padding: 0;
            margin: 0;
        }

        .tab ul li {
            box-sizing: border-box;
            padding: 0;
            float: left;
            width: 100px;
            height: 45px;
            line-height: 45px;
            list-style: none;
            text-align: center;
            border-top: 1px solid blue;
            border-right: 1px solid blue;
            cursor: pointer;
        }

        .tab ul li:first-child {
            border-left: 1px solid blue;
        }

        .tab ul li.active {
            background-color: orange;
        }

        .tab div {
            width: 500px;
            height: 300px;
            display: none;
            text-align: center;
            font-size: 30px;
            line-height: 300px;
            border: 1px solid blue;
            border-top: 0px;
        }

        .tab div.current {
            display: block;
        }
    </style>
</head>

<body>
    <div class="app">
        <div class="tab">
            <ul>
                <li @click='change(index)' :class="currentIndex === index ? 'active' : ''" v-for="(item,index) in list"
                    :key="item.id">{{item.title}}</li>
            </ul>
            <div :class="currentIndex === index ? 'current' : ''" v-for="(item,index) in list" :key="item.id">
                <img :src="item.path" alt="">
            </div>
        </div>
    </div>
    <script src="./js/vue.js"></script>
    <script>
        var xm = new Vue({
            el: '.app',
            data: {
                currentIndex: 0,
                list: [
                    {
                        id: 1,
                        title: '大苹果',
                        path: 'img/apple.png'
                    },
                    {
                        id: 2,
                        title: '好橙子',
                        path: 'img/orange.png'
                    },
                    {
                        id: 3,
                        title: '青柠檬',
                        path: 'img/lemon.png'
                    },
                ]
            },
            methods: {
                change: function (index) {
                    this.currentIndex = index
                }
            }

        })

    </script>
</body>

</html>